Grindr is more than a way to hook up, according to Jack Harrison-Quintana, director of Grindr for Equality (G4E). It’s an opportunity for public outreach. With 2 million daily active users, the gay social network is uniquely situated to address health, justice, and other important issues among LGBT populations. Harrison-Quintana has teamed up with Lebanese activists and used Grindr’s messaging platform to contact queer Syrian refugees about community support. In the United States, where a survey showed geographical and racial disparities in Pre-Exposure Prophylaxis (PrEP) use, G4E sent targeted messages—in English and Spanish—educating Grindr users about the therapy that vastly reduces HIV transmission risk. Follow-up research recently showed that G4E influenced 20 percent of new PrEP users’ decisions to start treatment. (Photo courtesy of Jack Harrison-Quintana)